JP3256497B2 - Wide area IP packet communication system and configuration management device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention deteriorates IP packet transfer performance of an IP packet communication device and a wide area IP packet communication system when a LAN terminal device supports a wide area movement of a host on an IP packet transfer network. The present invention relates to an IP packet communication system capable of always and accurately specifying host location information without using the same.

[0002]

2. Description of the Related Art A conventional wide area IP packet communication system includes a LAN interface, a plurality of LAN terminals, a LAN interface, and a communication link interface having a function of transmitting and receiving IP packets using the interface. A plurality of LAN terminal accommodating devices and a plurality of communication link interfaces having a function of transferring IP packets between these interfaces and a function of reading an IP address given to a LAN terminal device connected to the LAN interface And an IP packet transfer device for transferring IP packets between these interfaces.
Connecting the AN terminal accommodating device with a LAN, connecting the LAN terminal accommodating device and the IP packet transfer device with a wired link,
Multiple IPs combining these devices in a network
A packet communication device, and a plurality of communication link input interfaces, wherein the IP in the IP packet communication device is
It had a wide area IP packet transfer device connected to the packet transfer device by a wired link.

In such a wide area IP packet communication system, each LAN terminal accommodating apparatus uses a routing protocol such as OSPF, for example, via a wired interface for transferring IP packets, by reading the IP address of the LAN terminal apparatus. Need to notify the IP packet transfer apparatus.

[0004] The IP packet transfer apparatus itself specifies the location information of the LAN terminal device based on the input IP address and the interface number used for the input, and
Further, based on the information, the IP packet transfer table to be held by the user is created by himself.

[0005] Further, the IP packet transfer device is connected to the LA terminal accommodating device connected to itself.
It has been necessary to notify the IP address of the N terminal device to the wide area IP packet transfer device via a wired interface for IP packet transfer using, for example, a routing protocol such as OSPF.

Further, the wide area IP packet transfer device specifies the position information of the LAN terminal device itself based on the input IP address and the interface number used for the input, and based on the information, determines the position of the LAN terminal device itself. Has created the wide area IP packet transfer table to be held by himself.

In such a conventional system, I
The P packet transfer device needs to create its own local IP packet transfer table to be held by itself.
While the packet transfer device is performing this process, the transfer process of the IP packet is interrupted. Generally, the load of this processing becomes very heavy as the number of LAN terminal accommodating devices increases, so that the time during which the transfer processing of the IP packet is interrupted also becomes long.

The wide-area IP packet transfer apparatus also needs to create its own wide-area IP packet transfer table, and while the wide-area IP packet transfer apparatus is performing this processing, the transfer processing of the IP packet is performed. Interrupt. In general, the load of this processing becomes very heavy as the number of LAN terminal accommodating devices and IP packet transfer devices increases, so that the time during which IP packet transfer processing is interrupted also becomes long. Therefore, there is a problem that the transfer capability of the IP packet of the wide area IP packet transfer apparatus becomes very small apparently.

[0009]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to eliminate the load of creating a local IP packet transfer table from an IP packet transfer apparatus and to reduce the load on a wide area IP packet transfer apparatus from a wide area IP packet transfer apparatus. An object of the present invention is to provide an IP packet communication system in which the load of creating an IP packet transfer table is eliminated and the IP packet transfer device and the wide area IP packet transfer device can devote themselves to IP packet transfer.

[0010]

In order to achieve the above object, a wide area IP packet communication system according to the present invention includes a configuration management device having a plurality of communication link input interfaces and communication link output interfaces, and each LAN has a configuration. A terminal accommodating device having a communication link output interface connected by a communication link to a communication link input interface of the configuration management device; and a communication link connecting the IP packet transfer device to a communication link output interface of the configuration management device by a communication link. With an input interface,
The wide area IP packet transfer device has a communication link input interface connected to a communication link output interface of the configuration management device by a wired link, and each LAN terminal accommodation device notifies the configuration management device of the read IP address of the LAN terminal device. The IP packet transfer device,
The device has a function of receiving a local IP packet transfer table from the configuration management device and a function of performing IP packet transfer using the IP packet transfer table. The wide area IP packet transfer device receives the wide area IP packet transfer table from the configuration management device. And a function for performing an IP packet transfer using the IP packet transfer table, and the configuration management device is provided with an IP address input from the communication link input interface and a communication link input interface used for inputting the IP address. The IP address given to the LAN terminal device based on the interface number, and the IP packet transfer device
A function of generating a local IP packet transfer table indicating a relationship with an interface number to be used when transferring an IP packet to a LAN terminal accommodating apparatus connected by N, and an IP address assigned to the LAN terminal apparatus; The relation between the wide area IP packet transfer device and the interface number to be used when transferring the IP packet to the LAN terminal accommodating device connected to the LAN terminal device via the LAN and the IP packet transfer device connected via the wired link is described. And a function of generating a local IP packet transfer table, which is connected to a LAN terminal accommodating device connected to the LAN terminal device via a LAN, by a wired link.
A function of outputting from a communication link output interface that accommodates a wired link to which the P packet transfer device is connected,
And the generated wide area IP packet forwarding table in the wide area I
It has a function of outputting from a communication link output interface that accommodates a wired link to which the P packet transfer device is connected.

The configuration management apparatus used in the wide area IP packet communication system according to the present invention is based on an IP address input from a communication link input interface and an interface number of the communication link input interface used for inputting the IP address. The relationship between the IP address assigned to the LAN terminal device and the interface number to be used when the IP packet transfer device transfers the IP packet to the LAN terminal accommodating device connected to the LAN terminal device via the LAN. And a function of generating a local IP packet transfer table shown in FIG. 1, and an IP address assigned to a LAN terminal device, and a wide area IP packet transfer device connected to a LAN terminal accommodating device connected to the LAN terminal device via a LAN by a wired link. IP packet transfer device A function of generating a wide-area IP packet forwarding table showing the relationship between the number of the interface to be used when transferring the bets, further, the generated local IP packet forwarding table, and the LAN terminal device L
A function of outputting from a communication link output interface accommodating a wired link to which an IP packet transfer device connected by a wired link to a LAN terminal accommodation device connected by an AN, and a generated wide area IP packet transfer table. And a function of outputting from a communication link output interface that accommodates a wired link to which the wide area IP packet transfer device is connected.

According to the wide area IP packet communication system of the present invention, the function of specifying the position information of the LAN terminal device and the function of creating the IP packet transfer table based on the information are separated from the IP packet transfer device. By moving to the configuration management device, the IP packet transfer device can concentrate on the transfer of the IP packet.

[0013] Further, by adding a communication link interface to the IP packet transfer apparatus, connecting the communication link interface to a communication link output interface of the configuration management apparatus by a wired link, and receiving an IP packet transfer table from the configuration management apparatus, The IP packet transfer device can always have an IP packet transfer table that accurately indicates the position of the LAN terminal device, so that the IP packet transfer can be performed accurately.

Further, the function of specifying the position information of the LAN terminal device and the function of creating a wide area IP packet transfer table based on these functions are separated from the wide area IP packet transfer apparatus and transferred to the configuration management apparatus, so that the wide area IP packet The transfer device can concentrate on the transfer of the IP packet.

[0015] Further, a communication link interface is added to the wide area IP packet transfer apparatus, and this is connected to a communication link output interface of the configuration management apparatus by a wired link, and a wide area IP packet transfer table is received from the configuration management apparatus. As a result, the wide area IP packet transfer apparatus can always have a wide area IP packet transfer table that accurately indicates the position of the LAN terminal apparatus, and thus the IP packet transfer can be performed accurately.

[0016]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an example of the configuration of a wide area IP packet communication system according to the present invention. In the figure, 1 is a LAN terminal device, 2 is a LAN terminal accommodation device, 3 is an IP packet transfer device, 4 is a wide area IP packet transfer device, and 5 is a configuration management device.

The LAN terminal device 1 is connected to the LAN terminal accommodating device 2 by the Ethernet interface 11, and
Send and receive P packets.

The LAN terminal accommodating apparatus 2 transmits and receives IP packets to and from the IP packet transfer apparatus 3 via the data transfer link 12. It also has a slot for a mobile card,
The authentication ID and the IP address are read from the inserted portable card 19, and the authentication processing 14 of the LAN terminal device is performed by the authentication ID. Also, before the authentication is completed and the authentication is NG
In this case, no IP packet is transmitted or received, and an IP address other than the IP address read from the mobile card is
When an IP packet set in the P address is received from the LAN terminal device 1, the IP packet is discarded. Further, after the authentication is completed, the IP address read from the portable card is transmitted to the configuration management device 4 through the control link 13.

The IP packet transfer device 3 communicates with the LAN terminal accommodating device 2 and the wide area IP packet transfer device 4 by IP.
The transmission and reception of the packet 15 is performed, and the local IP packet transfer table 17 is received from the configuration management device 5 through the control link 13. The transmission of the IP packet is performed using this local I
This is performed according to the P packet transfer table.

The wide area IP packet transfer device 4 performs an IP packet transfer process between the IP packet transfer devices 3.
In addition, a wide area I is controlled by the control link 13 from the configuration management device 5.
The P packet transfer table 18 is received. The transfer of the IP packet is performed by using the wide area IP packet transfer table.

The configuration management device 5 includes the LAN terminal accommodation device 2
A local IP packet transfer table and a wide area IP packet transfer table are created on the basis of the IP address information 16 received from the server and the position information resolution table held by itself, and the IP packet transfer apparatus 3 and the wide area IP packet transfer apparatus 4 respectively generate the table. Send.

FIG. 2 shows an example of the position information solution table.
The position information solution table is fixedly set in the configuration management device 5 and accommodates the LAN terminal device 1 in the wide area IP packet transfer device 4 based on the input interface number of the control link 13 connected to the LAN terminal accommodation device 2. I
An interface number with the P packet transfer device 3, and
The interface number in which the LAN terminal device 1 in the IP packet transfer device 3 is accommodated is resolved.

FIG. 3 shows an example of the local IP packet transfer table. The local IP packet transfer table is composed of the IP address and the interface number of the IP packet transfer device 3 in which the LAN terminal device 1 is accommodated in the configuration management device 5. The local IP packet transfer table is transmitted from the configuration management device 4 to the IP packet transfer device 3 via the control link 13, and the received IP packet transfer device 3 uses the IP packet transfer process as it is for the IP packet transfer processing.

FIG. 4 shows an example of the wide area IP packet transfer table. The wide area IP packet transfer table stores the IP address and the IP address of the LAN terminal 1 in the wide area IP packet transfer apparatus 4 in the configuration management apparatus 5.
It is composed of an interface number with the packet transfer device 3. The wide area IP packet forwarding table is a control link
13, the wide area IP packet transfer apparatus 4 which is transmitted from the configuration management apparatus 4 to the wide area IP packet
Are used as they are in the IP packet transfer processing.

Next, the procedure for managing the position information of the LAN terminal device 1 in the wide area IP packet communication system shown in FIG. 1 will be described. First, a user connects the LAN terminal device 1 to the LAN terminal accommodating device 2 with an Ethernet cable, and inserts a portable card into the card slot of the LAN terminal accommodating device 2. LAN terminal accommodating device 2 is a ROM of a mobile card
The authentication ID and the IP address set in are read. The LAN terminal accommodating device 2 performs authentication by using the authentication ID. Next, the LAN terminal accommodation device 2
Sends the IP address 16 to the configuration management device 5 by the

The configuration management device 5 receives the received IP address
The location information of the terminal device is resolved by the location information resolution table from the IP address and the location information, and a local IP packet transfer table and a wide area IP packet transfer table are created from the IP address and the location information. 3 and the wide area IP packet transfer device 4. The IP packet transfer apparatus 3 performs the transfer processing of the IP packet to the LAN terminal accommodating apparatus by using the received local IP packet transfer table as it is. Also, the wide area IP packet transfer device 4 uses the received wide area IP packet transfer table as it is
The IP packet is transferred between the packet transfer devices.

[0027]

As described above, the wide-area IP of the present invention can be used.
According to the packet communication system, a LAN with a heavy processing load
Since the processing of collecting the position information of the terminal device and the processing of creating the local IP packet transfer table can be separated from the IP packet transfer apparatus, the IP packet transfer apparatus can concentrate on the transfer processing of the IP packet,
In addition, the process of collecting the position information of the LAN terminal device having a heavy processing load and the process of creating the wide area IP packet transfer table are performed.
Since it becomes possible to separate from the wide area IP packet transfer apparatus, the wide area IP packet transfer apparatus can concentrate on the transfer processing of the IP packet, and the wide area IP packet transfer apparatus can be used in a situation where the LAN terminal apparatus moves frequently. In addition, it is possible to minimize the deterioration of the performance of IP packet transfer as seen in the conventional method.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a configuration of a wide area IP packet communication system of the present invention.

FIG. 2 is a diagram illustrating an example of a position information solution table.

FIG. 3 is a diagram illustrating an example of a local IP packet transfer table.

FIG. 4 is a diagram illustrating an example of a wide area IP packet transfer table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 LAN terminal device 2 LAN terminal accommodation device 3 IP packet transfer device 4 Wide-area IP packet transfer device 5 Configuration management device 11 Ethernet 12 Data transfer link 13 Control link 14 Authentication processing 15 IP packet 16 IP address information 17 IP packet transfer table 18 Wide-area IP packet transfer table 19 Mobile card

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoya Kugutsu 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Hiroyuki Hara 3-19 Nishishinjuku, Shinjuku-ku, Tokyo No. 2 Inside Nippon Telegraph and Telephone Corporation (72) Inventor Makoto Umeuchi 3-19-2 Nishi Shinjuku, Shinjuku-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (56) References Naoya Watanabe et al., Next-generation computer network Backbone system construction method, NTT R & D, Telecommunications Association of Japan, April 10, 1998, Vol. 47, No. 4, pp. 435-444, 001, CSNH 199800088007 1998 IEICE General Conference B -7-62, March 6, 1998 IEICE Communications Society Conference B-7-50, September 7, 1998 Electronic Information and Communication JSCE Communication Society Conference B-7-51, September 7, 1998 (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04L 12/56 H04L 12/46 H04L 12/66 H04L 12/28

Claims (2)

(57) [Claims] 1. A plurality of LAN terminals, a LAN interface, and a communication link interface having a LAN interface and a function of transmitting and receiving IP packets using the interface, and transferring IP packets between these interfaces. A plurality of LAN terminal accommodating devices and a plurality of communication link interfaces having a function of performing an IP address assignment and a function of reading an IP address assigned to a LAN terminal device connected to the LAN interface, and An IP packet transfer device for transferring packets; a LAN terminal device and a LAN terminal accommodating device connected by a LAN; a LAN terminal accommodating device and an IP packet transfer device connected by a wired link; Multiple IP packets combined Communication apparatus, and, comprises a plurality of communication links the input interface, the IP
In a wide area IP packet communication system including a wide area IP packet transfer apparatus connected to an IP packet transfer apparatus in a packet communication apparatus by a wired link, a configuration management apparatus including a plurality of communication link input interfaces and communication link output interfaces is provided. Each LAN terminal accommodating device has a communication link output interface connected to a communication link input interface of the configuration management device by a communication link, and the IP packet transfer device is connected to a communication link output interface of the configuration management device by a communication link. A wide area IP packet transfer device has a communication link input interface connected by a wired link to a communication link output interface of the configuration management device, and each LAN terminal accommodating device has a read LAN terminal. Location of I
A function of notifying the P address to the configuration management device;
A function of receiving a P packet transfer table and a function of transferring an IP packet using the IP packet transfer table;
A function of receiving a P packet transfer table and a function of transferring an IP packet using the IP packet transfer table, and a configuration management device used for inputting an IP address input from a communication link input interface and inputting the IP address Based on the interface number of the communication link input interface to be used, the IP address assigned to the LAN terminal device and the IP packet transfer device transfer the IP packet to the LAN terminal accommodating device connected to the LAN terminal device by LAN. A function of generating a local IP packet forwarding table indicating a relationship with an interface number to be used at the time;
The IP address given to the AN terminal device, and the wide area IP packet transfer device transfers the IP packet to the IP packet transfer device connected by a wired link to the LAN terminal accommodating device connected to the LAN terminal device by LAN. A function of generating a wide-area IP packet transfer table indicating a relationship with an interface number to be used at the time of transmission.
A function of outputting from a communication link output interface accommodating a wired link to which an IP packet transfer device connected by a wired link is connected to a LAN terminal accommodating device connected to the AN terminal device by a LAN, and a generated wide area IP A wide area IP packet communication system having a function of outputting a packet transfer table from a communication link output interface that accommodates a wired link to which a wide area IP packet transfer apparatus is connected. 2. A configuration management apparatus used in a wide area IP packet communication system, comprising: an IP address input from a communication link input interface; and an interface number of a communication link input interface used for inputting the IP address. The relationship between the IP address given to the LAN terminal device and the interface number to be used when the IP packet transfer device transfers the IP packet to the LAN terminal accommodating device connected to the LAN terminal device via the LAN. A function of generating a local IP packet forwarding table, and L
The IP address given to the AN terminal device, and the wide area IP packet transfer device transfers the IP packet to the IP packet transfer device connected by a wired link to the LAN terminal accommodating device connected to the LAN terminal device by LAN. A function of generating a wide area IP packet transfer table indicating a relationship with an interface number to be used at the time of transmission.
A function of outputting from a communication link output interface accommodating a wired link to which an IP packet transfer device connected by a wired link is connected to a LAN terminal accommodating device connected to the AN terminal device by a LAN, and a generated wide area IP A configuration management device having a function of outputting a packet transfer table from a communication link output interface that accommodates a wired link to which a wide area IP packet transfer device is connected.